Liquid delivery pump



Oct. 3, 1939. T. BONEN LIQUID DELIVERY PUMP Filed June 15. 1938 s Shaets-Sheet 1 /,;ZD-7ZZ{07"" 775mm; .Zfiozzera Oct. 3, 1939. T, L, BQNEN 2,174,564

LIQUID DELIVERY PUMP Filed June 15, 1938 s Sheets- Sheet 5 Z .40

52 4 7 75 FE A lll f/ioznczal 3072673 Patented 0.. 3, 1939 UNITED STATES PATENT .OFFlCE LIQUID DELIVERY Pm Thomas 1.. Bonen, Chicago, 11]., assignor oi onethird to D. C. Strauss and one-third to Charles W. Huck, both of Chicago, Ill. Application June 15, 1938, Serial No. 213,759

14 Claims.

pressor having a rugged, durable construction necessitating inspection,

which will operate effectively for long periods of time without requiring attention.

Another object of the invention is to provide a compressor having but few moving parts which, when once assembled, require no adjustment.

A further object of the invention is to provide an oiling system for a compressor unit of the type described which will eile'ctively deliver lubricating oil between all relatively moving surfaces whereby the compressor unit will be properly lubricated at all times during operation, and whereby oil will be retained in contact with substantially all exposed wearing surfaces during periods when the compressor is not operating.

- A further object of the invention is to provide a combination of parts in a compressor of the type described which will enable the use of a reclprocating piston element in a hermetically sealed casing without involving the disadvantages which have heretofore existed in the reciprocating piston type unit.

A further object of the invention is to combine an improved oiling system with a reciprocating piston type unit in such away that such \mit may be employed in a sealed casinE without repair or other attention for the life of the unit.

A- further object of the invention is to provide an improved form of oiling system in devices which involve the use of a rotor element rotating on a normally vertical axis, in which parts of the oil propelling mechanism become operative in response to movement of the rotor element.

A further object of the invention a compressor oiling mechanism which will effectively operate with a relatively small quantity of oil.

lo'these and other ends the present invention resides in certain relationships and combinations of parts, all as will be explained in the following specification and particularly pointedout in the claims appended thereto.

In the drawings, illustrating a preferred em- .bodinient of the invention: Fig. 1 is a cross-sectional view, illustrating the compressor unit. within its hermetically sealed 1'ig. 2 is a fragmentary cross-sectional view.

and more particularly to compressors is to provide taken substantially at right angles to the view of Fig. 1; V v

Fig. 3 is a horizon a1 sectional view, taken on line 33 of Fig. 1, illustrating the cylinder, piston and valve blocks;

Fig. 4'is a horizontal sectional view, taken on line 4-4 of Fig. 2, illustrating the upper surfaces of the valve. block and the eccentric portion of the stationary bearing element;

Fig. 5 is a horizontal sectional view, taken 'on line 5-5 of Fig, 1, illustrating the oil propelling mechanism; and

Fig. 6 is a the oil conduit and the duct which forms the connecting passage between the oil conduit and the oil propelling mechanism. 7

Similar reference numerals throughout the several views indicate the same parts.

The compressor unit, as herein disclosed, comprises a hermetically sealed housing supporting the field winding and laminations of an electric motor. The armature or rotating part of the motor is arranged on a rotor element in the form of a sleeve which rotates with the armature around a spindle or stationary bearingelement. Also mounted to. rotate with the rotor is a cylinder block having cylinders formed therein containing pistons which are caused to reciprocate within the cylinders as the cylinder block rotates, this being'due to thefact that the pistons are connected through a combined valve and crank block element to an eccentric spindle or crank element at the upper end of a main,-concentric, stationary bearing element.

' The lower portion of the casing preferably constitutes an oil reservoir which delivers oil into an oil propelling mechanism formed in part on the stationary bearing element and in part on the rotor element, the .stationary bearing element being formed with conduits through certain of which oil may be delivered to all moving surfaces and through certain other of which gas is delivered to the compression chambers of the cylinders. An arrangement of passages is also-provided for redelivering the oil to the oil reservoir.

horizontal sectional view, taken on 7 line $6 of Fig. 1. illustrating the lower end of Referring more particularly to the drawin s.

the hermetically sealed casing, indicated at ll, may be constructed in any desired way for convenient assembly with a supporting base. The bottom wall of easing II is provided with an opening to te the intake conduit, indicated generally at H, and at some other suit; ole point, preferably near the top of the casing ll,

there is provided a discharge fitting I! for a u pressure line to conduct gas under pressure to the usual receiver from whence it may pass successively to the usual condenser and evaporator and thence back to the intake or suction line H.

Suitable cooling fins l3, l3 are formed on the casing l8. These fins may be of conventional form.

Within the casing III are preferably mounted all of the operating parts of the compressor unit. Secured to thelower wall of casing I8 is a spindle or stationary bearing element, indicated generally at l4. 'On this spindle there is rotatably mounted a rotor element, designated generally at l5. At the upper end of the rotor, and rotatable therewith, is the compressor unit proper, designated at I6.

The spindle or stationary bearing element l4 comprises a base flange ll, having an upstanding annular casing 18 fitted thereon, a main, concentric bearing l8, and a supplemental, eccentric bearing or crank element 28. The base H, as illustrated, is preferably formed with bolt openings 2|, 2| arranged to register with openings 22, 22 formed in the bottom wall of easing l0 whereby the stationary bearing element can be rigidly secured to the casing. A gasket 23 is preferably employed between the base I! and casing to insure a gas-tight connection. e

The rotor element I5 is preferablyformed as a part of an electric motor 24 which comprises a rotatable armature 25, and a stator comprising field laminations 26, and fieldwindings 21. The armature 25 may be conveniently wedged or keyed to the rotor l5 and a flange 28 is preferably formed near the upper end' of rotor l5 against the underside of which the armature is held. Suitable supporting means, herein shown as an angle ringelement 28, is secured to the casing III to support and firmly hold the stator element or the motor 24. Y

Current is led to the winding 21 through conductor element 30 passing to the outside of casmg I ll through a sealed ljoint 3|.

The rotor element I5 is supported on and is fitted to the stationary bearing element l 8 at several points. Thelower portion of the rotor element I5 is formed with an annular cut providing a horizontal bearing surface 33 which rests upon the top edge 84 .of the annular casing l8, and Providing a downwardly projecting ring element 38 having a; surface 86, formed to provide a slight clearance relative to the inner edge surface of casing l8. The bearing element I8 is provided with a lower bearing surface 38 and an upper bearing surface 38. Between these bearing surfaces the element I8 is preferably reduced in a diameter to avoid excessive friction between the rotor and element l8 and to facilitate the return flow of oil as will be later pointed out.

The compressor mechanism l6 comprises essentially a cylinder block 4| connected to the rotor l5, and a piston block 42 connected to the eccentric bearing element, or crank 28 by means of a crank and valve block 43. The cylinder block 4| has formed therein cylinder openings 4la and 4"). This cylinder block is supported on the flange 28 of the rotor and preferably is secured thereto by a pair of machine bolts 44, 44, fitted within openings 45, 48, formed in the cylinder block and having their lower ends threaded into tapped out openings in theflange 28. In order tofacilitate the fitting of the cylinder block on to the flange 28, the cylinder block is formed with a pair of depending portions 46, 46, bearing laterally against opposite sides of the flange 28.

The rotor I5 is provided with an upstanding ring portion 41 forming a continuation of the bearing surface and extending above the surface of. the flange 28 to a point approximately in line with the upper end of the concentric bearing element or spindle l8. The cylinder block is formed to loosely surround the portion 41, leaving a space'I 48, facilitating oil return as will be presently described.

The cylinder heads 5|, 5| are each formed with a discharge valve assembly indicated generally at 52 to be presently described.

The piston block 42 preferably comprises a cylindrical member having an integrally formed piston at each end thereof designated at 53 and 54 respectively. The pistons are formed with open-ended ducts 55 and 56, respectively, extending from front to rear of the pistons. In order to maintain the piston block 42 against rotary movement with respect to the cylinder block there is preferably formed at the top of the pis-' ton block a groove 58 having fitted therein a guide shoe 59, secured in fixed relation to the cylinder block by a machine screw 68 preferably having an unthreaded portion 61 thereof fitted into an opening in the guide shoe 68.

- The cylinder block is preferably formed with a cut-away part indicated at 62, forming an oil chamber extending from the lower side of the cylinder block to a point above the piston block; see Figs; 1, 2, and 3.

For the purpose of facilitating distribution of oil the crank and valve block 43 is provided at the top thereof with grooves 63, 63 and 64,64, see Fig. 4. block 43 closely fits laterally between the rear faces of the pistons and the central portion of the piston block rests on the crank block, see Figs. 1 and 2. The top of the spindle is so formed with relation to the crank block and piston block that a slight clearance space will be provided at 65 for the distribution of oil entering at this point.

Delivery of oil to the compressor parts is made through a delivery conduit 66, formed in spindle l8, by means presently to be described.

The details of the gas compressor mechanism will now be particularly described. As previously indicated, the gas enters the casing l8 through the suction or intake line H. A connecting part 68, preferably -formed as an extension of the spindle l8, projects-through the bottom of casing ID. This part 68 is 'interiorly threaded to receive a threaded plug fitting 68. The suction tube III is suitably joined to plug 68, and a gasket "H is provided to insure a tight connection between parts 68 and 88. A check valve guide 12 is fitted against the under side of flange II at Y the lower end of a gas conduit 13. extending vertically of the spindle. l8 and forming a continuation of the suction tube III. This valve guide I2 embraces one end of a coil spring I4 bearing at its other end upon a movable check valve disc I! normally closing the opening in the plug 68 but permitting inflow of gas into conduit 13 when the operation of the compressor mechanism causes sumcient suction at'this point.

The conduit I3 extends upwardly through the concentric bearing element or spindle J8 and into the eccentric portion 28 and terminates in a widened port 16 which, in the present instance, extends over approximately a ninety-degree angle of the horizontal cross-section of the eccentric portion 28. Ports TI and 18 are formed, one on" each side of the combined crank and valve block 43 and serve to periodically connect the port It with the piston ducts and .58.

As indicated in Fig. 3, the motion of the rotor is preferably clockwise. Thus, as the piston 54 is carried around by the cylinder block it will move relatively to the block from an outer to an inner position. In Fig. 3, it is represented in substantially its innermost position. While the piston 55 has been moving thus, the opening 55 through the piston, the port 18' and the port have all been in free communication for somewhat 'more than ninety degrees of travel. During this time the space between the end of the cylinder and the cylinder head has been increasing from a mid-positionto a maximum position. The discharge valve 52 in the piston head remains closed during this period as it is designed to open under internal pressure and to stay closed during internal suction. -As soon as' the rotor has turned clockwise a short distance beyond that illustrated in Fig. 3, the port 18 will have passed out of communication with the widened port 16 so that the gas that has just been drawn into cylinder a will become temporarily trapped therein. As the cylinder block continues to rotate, carrying the pistons therewith, the piston 54 will gradually approach the end of the cylinder and build up a pressure which wilt-cause the discharge valve 52 to open, and gas under pressure will'be expelled into the interior onthe casing III. This cycle then continues alternately with each cylinder and piston constantly building up pressure within casing it. As pressure is built up the compressed gas is discharged through the discharge fitting I2. I

The discharge valve assembly 52 will now be described. As the discharge valve constructions are identical 9. description of one assembly will sunice. The above mentioned cylinder head ii is provided with a port opening I9 centrally thereof to permit flow of gas from the cylinder. The cylinder head 5| is in'the form of a disc and is embraced by an outer casing element 55 having suitable openings or perforations therein to permit the discharge of gas into the interior of casing ll. A pin 8! is secured to the casing upon which is slidably mounted a movable valve mem-' ber 52. A coil spring I! is eng ed with the member 82, belngretained therein by a channel 84 cut intothe rear face of the member 82. A thin disc 85. is provided to close the opening '19 and; a coil spring 85, retained in channel 81, formed in the front face of member 82 bears against the disc 85 to normally retain it in place over the port 1!. The disc 85 is preferably arranged to be opened with a. tilting motion and, for this purpose, a small pin OI is secured in the member 82 in position to contact the edge of disc 85 when the latter moves away from the opening 19. As the edge opposite pin 88 is free to move the greater distance, the disc 55 will be thus caused to tilt somewhat upon opening. x

The valve member .2 is held-away from the cylinder head plate 5| by means of a castellated ring 8! formed on its face. This ring bears normally against the rear face of plate 5|, being disposed in a circular recess in the rear face of 70 such plate.

The oiling system will now be more fully described. The oiling system is such that only a relatively small amount of surplus oil will be required to insure complete lubrication of all relatively movable surfaces, at all times. According 'is arranged. to close the end of the cylinder and to the present disclosure. oil is fed from a supply chamber to a channel within which is operatively arranged a. part adapted to move in response to' movement of the rotor element II whereby the oil in the channel is set in motion to cause it to rise through the oil conduit 55 by means of which the oil is distributed to the various parts of the device. In the present instance, the supply of oil is placed in the casing II, it beingonly necessary to flll the casingtoa shallow depth. A channel 90 is provided in the lower part of spindle l9.- This channel is preferably in the form of a circular groove extending entirely around the base portion of spindle ll, see Figs. 1, 2 and 5, and is enclosed by the previously mentioned annular casing 18. The top part of channel 90 is closed by the ring portion 35 on the rotor l5. In the present instance the ring portion 35 is provided with a plurality of propelling elements 9|, formed as extensions of the ring portion 35 and separated from each other by segmental cuts 92 leaving spaces or pockets between the .propelling members ll. Four mem-- bers SI, and four pockets 92 are herein illustrated but it is to be understood that a fewer or greater number can be employed. x

An opening 93 (see Fig. 5) is formed through the upstanding annular casing II to allow oil to be conducted from casing 10 into channel II. It is apparent that any oil that is present in channel 90 during movement of. the propelling elements 9i will be set in motion in the direction of movement of the elements 5|. Advantage is taken of this movement of the body of oil in the channel whereby the oil is caused to flow up through the conduit 66. For this purpose the channel 50 is formed at its outer periphery with a portion of restricted width this being provided by leaving an inwardly projecting circumferential portion 54 extending inwardly a distance so as to make a snug fitting contact with the outer faces of the propelling elements 9|, 9| as they rotate with the rotor I. The inwardly extending face of the portion II provides a bailie element having an axially extending face for deflection of the oil out of the channel in a manner presently to be An additional, or booster, opening 55 is preferably formed through the annular casing l8 somewhat beyond'the portion 94 for the W of accentuating the action of the oil propelling mechanism. Thisopening may be dispensed with, if desired, but. when employed, acts to materially increase the efliciency of the unit. when the direction of movement of the propelling elements ll, 9! is clockwise, as indicated by. the arrows in Figs. 3 and 5, there will be provided. just in front of the bailie portion 04 (as related to the direction of movement) a duct 98, formed as a vertically or axially extend-1 ing-cut in the casing ll.

The duct 95, as indicated in Figs. 5 and 6, is preferably crescent shaped in horizontal crosssection, and may be formed by machining out a portion of the inner wall of the casing l8.

' As best indicated in Fig. 1, the duct 05 preferably has its upper end substantially aligned;

with the upper limit of channel I. and the duct extends downward to connect with a laterally or radially extending conduit 51 in turn, to the conduit 55. Thus, when the propelling elements Oi,

oilin channel ll to be set in motion, it is apll, due to'their rotary movement within the channel 9. cause the body of channel 99 with the elements 9|, 9| until the narrow part of channel formed by the baffle portion 96 is reached. No more oil can pass through this section of channel 99 than will be contained in one of thepockets 92. As a result of this relationship of parts a portion of the moving stream of oil will strike the face of the baflle 94 and tend to pass into the duct 96 and thence through conduit 91 and up through the conduit 66 to deliver lubricating oil to the cylinder and piston assembly. As oil is-diverted front the channel 99 into the conduits '91 and 66, it is apparent that additional amounts of oil will enter through openings 93 and 96, this being caused by the suction developed due to forcing oil out through conduit 66.

It is also to be noted that the tendency of the oil stream to-be diverted into duct 96 and conduits 91 and 66 will be proportionate to the counter pressure existing at the discharge end of the conduit 66. It is also apparent that changes in the relative sizes of the various parts, such asthe channel 99, the propelling elements 9|, 9|, the duct 96, and the openings 93 and 96 will produce different degrees of oil pressure within the conduit 66.

It may be pointed out that, while the result of diverting the oil into duct 96 is produced in part by restricting the width of chamber 99, this result is 'accentuatedby the centrifugal force developed when the body of oil is set in rapid motion around the channel 99. The body of oil is caused by centrifugal force to press against the outer wall of channel 99 and, as soon as any increment of oil arrives at the duct 96, a portion of such increment is forced down into the duct 96. At this point the centrifugal force, previously acting upon the body of oil will be con- I ver-ted into centripetal force, causing the oil to flow through the radially extending duct 91 and up through conduit 66. Succeeding portions of the moving oil body continue to deliver increments of oil to the duct 96 with the result that there will be a substantially uniform and contin- The opening 96 is spaced an appreciable dis-' tance fromthe opening 92, it having been found, in practice, that when this opening 96 is spaced approximately 45 degrees beyond the opening 99 very satisfactory resultswill be obtained..

,As best illustrated in Fig. 5, the front faces of the propelling elements 9|, 9| are inclined forwardly relative-to a radial line extending from the center of the stationary bearing element I6. This inclination or pitch in the faces of the propelling elements 9| has the tendencyof retaining oil at this point and provides for somewhat more efficient delivery of oil into the duct --96 when the faces of the individual propelling elements reach a point opposite the duct 96.

As statedabove. the supply of oil is delivered directly into the casing I9, and while the amount of oil may vary, it has been found satisfactory to fill the casing II to substantially the levelindIcatedbythebrohcnlinesinFIgs.land2.

block during operation of the unit.- manner, the inner end surfaces of the pistons The level of oil in the casing I9 is' preferably such that, when the device is in operation, the

oil will not be drawn into the openings 93 and 96 so rapidly asto cause the level to lowerat this point sufliciently to permit the inflow of gas through these openings and through the'oil propelling mechanism.

When the oil passes up through conduit 66, the

. major portion of the stream will be delivered at the top of the eccentric portion 29 of the.

spindle or stationary bearing element I4 where a small space is preferably left between the top of the eccentric portion and the adjacent under surface of the piston block, as previously described. Part of the oil will be forced between the contacting surfaces of the block 43 and ec-' I centric portion 29. The major portion of the oil stream will-pass through the grooves 69 and 6|, certain of which will always be in direct communication with the chamber 62 in the cylinder In this will at all times be operating in a bath of oil.

In order to effectively deliver oil to the lower end of the combined crank and valve block :42, there is preferably provided a duct 99 leading from the conduit 66 and connected with a groove 99 preferably formed just above the point: of juncture between the eccentric portion 29 and. the concentric portion I9 of the spindle or stationary bearing element I6. Thus, a portion of the oil in passing up through conduit66 will pass out through.the small duct 98 into the groove 99, from which it will be forced botli upwardly and laterally to effectively lubricate the,- contacting surfaces between the block 49 and the bearing element.v

In order to provide for the return of oil there is preferably formed in the concentric bearing portion I9 a spiral groove I99 which, as indicated, in Fig. 1, preferably extends from the upper end of the concentric bearing portion I9, down to a point near the lower end of the portion I9 where it is joined to an annular, groove |9I formed in the portion I9. The oil passing into the groove- I9| is preferably carried away from this groove .through a duct I92 formedvin the rotor element I6. By this arrangementit is apparent that oil Passing" down through the spiral groove I99 and into the annular groove I9| will constantly pass. out through the duct I92, thence back to th main body of oil in the casing I 9.

Meansare preferably provided to protect the main body of oil in the casing I9 from undue agitation by the rotor I6 which would tend to cause foaming of the oil and consequently decrease the efficiency of the oil propelling mechanism. For this p rpose there is provided a bailie element I99, which in the present instance, is formed with a sleeve part I96 and a collar part I96. The lower part of the sleeve I96 is formed so as to closely embrace the annular casing I9 fixed to the stationary bearing element I9, as previously described. Sleeve I96 may be secured to the casing I9 in any desired manner to prestream of oil through the duct III. In orderto permit oil to flow from the space between the baiiie element and the rotor ll, there is preferably provided an opening I" in the sleeve iii of the baifle element. Due to the provision of this opening there will be a more or less constant stream of oil flowing from the opening it! during the operation of the unit. The collar element iltof the baiile is spaced down below the lower surface of the motor armature 2i and extends substantially to the inner face of the ileld windlubricated. The oil passing through the cylinder discharge valve will be thrown outwardly and will impinge upon the walls of the casing l0 where it will flow back into the oil supply at the bottom of the casing.

While, in the foregoing description, the device has been described as preferably one in which the rotor operates on an upright or vertically dis osed axis, it is not to be understood that the device is necessarily limited to \use in such a position as certain aspects of the device are equally well adapted for operation where the rotor element rotates about a horizontal axis. Thus, the terms upright and horizontal, when used herein, are to be understood as used in a relative sense and for convenience of description, except where the context necessarily requires a limitation to a particular arrangement. From the above description it is apparent that the present invention provides a gas compressor unit having few operating parts and havin combined therewith an eifective lubricating arrangement whereby operation of the unit will initiate operation of the lubricating elements causing a constant pressure delivery of oil between relatively movable contacting surfaces as long as the unit remains in operation Due to the arrangement in which oil is forcefully fed to bearings and other contacting surfaces, all parts requiring lubrication will receive oil in necessary quantities and the eifective life of the unit will be prolonged. While the present description sets forth a preferred embodiment of the invention, numerous changes may be made in the construction without departing from the spirit of the invention, and it is therefore desired that the present embodiment be considered in all respects as illus- '-trative and not restrictive, reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

I claim:

1. A liquid delivery pump liquids comprising a rotor, a element upon which tate, the stationary bearing element being formed with a liquid delivery conduit for deli'very of liquid therethrough, a casing surrounding" the stationary bearing element, said casing having an annular liquid retaining channel formed therein, means for delivering liquid to said chanfor oil and similar stationary bearin ,nel, a propelling element supported on the rotor therein,

liquids comprising a rotor, a vertically delivery conduit by a the rotor is adapted to'rofor delivery of liquid therethrough, a casing and extending into the annular channel to cause a flow of liquid in one direction therein upon rotationof the rotor, the stationary bearing element having an axially extending duct formed connected to said channel and being connected to the liquid delivery conduit by a radially extending duct formed in the stationary bearing element, whereby-liquid moving around the channel will pass into said axially extending duct under the action of centrifugal force and thence through the radially into the liquid delivery condui 2. A liquid delivery. pump for oil and similar I disposed stationary bearing element upon which the rotor is adapted to rotate, the stationary bearing element being formed with a liquid delivery conduit for delivery of liquid therethrough, a casing surrounding the stationary bearing element, said casing having an annular liquid retaining channel formed therein, said channel having its open side directed upwardly, means for delivering liquid to said channel, a propelling element supported on the rotor and extending downwardly into the annular channel to cause a flow of liquid in one direction therein upon rotation of the rotor, the stationary bearing element having an axially extending duct formed therein, connected to said channeland being connected to the liquid radially extending duct formed in the stationary bearing element, whereby liquid moving around the channel will pass into said axially extending duct under the action of centrifugal force and thence through the radi-- ally extending duct and into the liquid delivery conduit.

3. A liquid delivery pump for oil and similar liquids comprising a rotor, a vertically disposed stationary bearing element upon which the rotor is adapted to rotate, the stationary bearing element being formed with a liquid delivery conduit for delivery of liquid therethrou'gh, a casing surrounding the stationary bearing element, said casing having an annular liquid retaining channel formed therein, said channel having its open side directed upwardly, means for delivering liquid to said channel. a downwardly extending annular portion on the rotor projecting into and completely closing the upwardly directed opening of the channel, a propelling element extending downwardly from said annular portion into the channel to cause' a flow of liquid in one direction therein upon rotation of the rotor, the stationary bearing element having an axially extending duct formed therein, connected to said channel and being connected to the liquid delivery conduit by a radially extending duct formed in the stationary bearing element, whereby liquid moving around the channel will pass into said axially extending duct under the action of centrifugal force and extending duct and into the'liquid delivery eonduit.

4. A liquid delivery pump for oil and similar liquids comprising a rotor, a vertically disposed stationary bearing element upon which the rotor is adapted to rotate, the stationary bearing element being formed with a liquid delivery conduit uid to said channel, a downwardly extending an-' extending duct and thence through the radiallysursaid'lo nular portion on therotor extending intoand n} completely closing the upwardly directed opening of the channel, a propelling element extending vertically downward from said annular portion into the channel and filling a major portion of v the radial width of the channel to cause a now of liquid in one-direction therein upon rotation of the rotor, the stationary bearing element having an axially extending duct formed therein, conthrough the radially extending duct and into the v liquid delivery conduit.

5. A liquid delivery pump for oil and similar liquids comprising a rotor, a stationary bearing element upon which the rotor is adapted to rotate, the stationary bearing element being formed with a liquid delivery conduit for delivery of the .liquid therethrough, a casing surrounding the stationary bearing element, said casing having an annular liquid retaining channel formed therein, means for delivering liquid to said channel, means operable upon rotation of. the rotor for causing a flow of liquid in one direction in.

said channel, said casing having an axially extending duct formed therein and, connected to the liquid delivery conduit by a substantially radially extending duct iformed in the stationary bearing element, a baflleelement in said annular channel, extending axially therein adjacent the outer periphery there'of and located in close proximity with the axially extending duct and beyond same in the direction of flow of liquid around the annular channel, whereby liquid moving with momentum around the channel will impinge upon the baille element and will be deflected to flow axially with appreciable force into the axially extending duct and thence through the radially extending duct into the liquid delivery conduit.

6. A liquid delivery pump for oil and similar liquids comprising a rotor, a vertically disposed stationary bearing element upon which the rotor is adapted to rotate, the stationary bearing element being formed with a liquid delivery conduit for delivery of liquid therethrough, a casing surrounding the stationary bearing element, said casing having an annular liquid retaining channel i'ormed therein, means for delivering liquid to said channelfa propelling element supported on the rotor and extending into the channel to cause a flow of liquid in one direction therein upon rotation of the rotor, said casing having a downwardly. extending duct formed therein and connected to the liquid delivery conduit by a laterally extendingduct formed in the stationary bearing element, a battle element in said annular channel extending vertically therein adjacent the outer periphery thereof and located in close proximity with the downwardly extending duct and beyond same in thedirection ofrotation 01' the propelling-elements on the rotor, whereby liquid moving th momentum around the channel will impinge upon the heme element and will be deflected to how downward with appreeiable force into the downwardly extending duct and thence through-the laterally extend-, ins duct into the liquid delivery conduit.

7. A liquid delivery pump for oil and similar liquids comprising a rotor, a vertically disposed stationary bearing element upon which the rotor is adapted to rotate, the stationary bearing element being formed with aliquid delivery conduit for delivery of the liquid therethrough, a casing surroundingthe stationary bearing element, said casing having an annular liquid retalning channel formed therein, a liquid reservoir located adjacent the casing, said casing being formed with an opening for admission or the liquid from the reservoir to the annular channel, a propelling element supported on the rotor and extending into the annular channel to cause a flow of liquid in one direction therein upon ro-. tation of the rotor, said casing having/a downwardly extending duct formed therein and connected to the liquid delivery conduit-by a laterally extending duct formed in the stationary bearing element, a baflle element in said annular channel extending vertically therein adjacent the outer periphery thereof and located between the downwardly extending duct and the opening .leading into the channel from the reservoir, the baflie element being disposed beyond the downwardly extending duct in the direction of flow of liquid around the channel, whereby liquid moving with momentum around thechannel will impinge upon the baille element and will'be defiected to flow downwardly with appreciable force into the downwardly extending duct and thence through the laterally extending duct into the liquid delivery conduit.

8. A liquid delivery pump for oil and similar liquids comprising a rotor, a stationary bearing element upon which the rotor is adapted to rotate, the stationary bearing element being formed with a liquid delivery conduit for delivery of the liquid therethrough, a casing surrounding the sationary bearing element, said casing having an annular liquid retaining channel formed therein, a liquid reservoir located adjacent the casing, said casing being formed with an opening for admission of the liquid from the. reservoir to the annularchannel, a propelling el'ement supported on the rotor and extending into the annular channel to cause a flow of liquid in one direction therein upon rotation of the rotor, said casing havingan axially extending duct formed therein connected to the channel at one end and connected. atits other end to a radially extending duct formed in the stationary bearing element, said duct being in turn connected to the liquid delivery conduit, a baiile element'in said annular channel extending axially therein adjacent the outer periphery thereof and located between the axially extending duct and the opening leading into the channel from the reservoir, the, baflle element being disposed beyond the axially extending duct in the direction of flow of liquid around thechannel, said opening leading into the channel from the reservoir being located relatively closely 'to the bane,

whereby liquid enterin through the casing opening into'the chann will pass a major portionof the distance around the channel, and after impinging against the baiile element, will be deflected to flow with appreciable force into the axially extending duct and thence through the radially extending duct into the liquid delivery conduit.

9. A liquid delivery pump for oil and similar liquids comprising a rotor, a stationary bearing element upon which the rotor is adapted to rotato, the stationary bearing element'- being formed with a liquid delivery conduit for delivery of liquid therthrough, a casing surroundnel formed therein, a portion of said exthe rotor, said propelling element being elongated in a circumferential direction and having a radial width suflicient to extend substantially across the channel V at the restricted portion formed by the inwardly extended portion of the casing, a liquid reservoir located adjacent the casing, said casing being formed with a delivery opening leading from the reservoir into the channel at a point'located between the ends of the inwardly extended portion, said casing having an axially extending duct formed therein, connected to the channel at one end, there 'being a radially extending duct formed in the stationary bearing element and connecting the radially extending duct to the liquid delivery conduit, one end of the inwardly extending portion of the casing providing a baflle element having a face extending axially and located between the axially extending duct and the opening leading into the channel from the reservoir, whereby, when the rotor is set in rotation so that the propelling elements pass successively the axially extending duct, the baflle and the liquid admission opening from the reservoir, liquid entering the channel at said opening will flow around the channel and a portion of the liquid will impinge upon the baiile and will be forced into the axially extending duct and thence through the radially extending duct to the liquid delivery conduit.

10. A liquid delivery pump for oil and similar liquids comprising a rotor, a stationary bearing .element upon which the rotor is adapted to rotate,

the stationary bearing element being formed with a liquid delivery conduit for delivery of liquid therethrough, a casing surrounding the stationary bearing element, said casing having an annular liquid retaining channel formed therein, a portion of said casing extending inwardly of the channel and having a circumferentially extending face concentric with the channel, a propelling element on the rotor extending into the channel to cause a flow of liquid in one direction therein upon rotation of the rotor, a liquid reservoir located adjacent the casing, said casing being formed with a delivery opening leading from the reservoir into the channel at a point located between the ends of the inwardly extended portion, the casing having an axially extending duct formed therein, connected to the channel at one end, there being a radially extending duct formed in the stationary bearing element and connecting the radially extending duct to the liquid delivery conduit, one end of the inwardly extending portion of the casing providing a baile ele ment having a face extending axially and located between the axially extending duct and the opening leading into the channel from the reservoir,

said propelling element having a radial width,

suflicient to extend substantially across the channel at the restricted portion thereof formed by the inwardly extending portion on the casing, said propelling element also having a length in a circumferential direction greater than the distance from the baiile to the admission opening in the inwardly extending portion of the casingf whereby the admission opening will be closed periodically during the passage of the propelling element around the channel, said casing being formed with an additional admissionopening from the oil reservoir to the channel located beyond the restricted portion of the channel whereby liquid may continue to enter the channel when the first mentioned admission opening is closed by the propelling element,

11. A liquid delivery pump for oil and similar liquids comprising a rotor. a vertically disposed stationary bearing element upon which the rotor is adapted to rotate, the stationary bearing element being formed with a liquid delivery conduit for delivery of the liquid therethrough, a casing located in juxtaposition to the stationary bearing element, said casing having a liquid retaining channel formed therein, means for delivering liquid to said channel, means operable upon rotation of the rotor for causing a flow of liquid in one direction in said channel, said casing having a downwardly extending duct formed therein extending from said channel and connected to the liquid delivery conduit by a laterally extending duct formed in the stationary bearing element, a ballle element in said channel extending vertically therein and located in close proximity with the downwardly extending duct and beyond same in the direction of flow of liquid in the channel, whereby liquid moving with momentum in the channel will impinge upon the baiile element and will be deflected to flow with appreciable force into the downwardly extending duct and thence through the laterally extending duct into the L'quid delivery conduit.

12. A liquid delivery pump system for oil and similar liquids comprising, a sealed casing, an upright, stationary-bearing element located in the casing, a body of liquid contained in the lower part of the casing, a rotor element comprising a casing surrounding and rotatable upon the stationary bearing element, liquid propelling mechanism operative connected to the rotor casingand the stationary bearing element and located below. the level of the liquid in said sealed casing, means for delivering liquid from the liquid supply in said sealed casing to the liquid propelling mechanism, said stationary bearing element being provided with passageways for the delivery ofliquid to the upper end thereof and for the return of liquid to a point adjacent the lower end of the rotor casing, said rotor casing with a duct to provide for the being formed return of liquid to the body of liquid in the sealed casing, and'a baille element in the form of a surrounding the rotor and extending upwardly from a point below the level of liquid in the sealed casing to a point adjacent said duct, whereby the baiile element will receive the flow of liquid from said duct and will thereby substantially protect the body of liquid in the sealed casing from impingement of the ilow from said duct and from direct contact with the rotating surface of the rotor, thiis tending to prevent agisleeve tation of the major portion'of the body of liquid in the sealed casing.

13. A liquid delivery pump system for oil and similar liquids comprising a rotor, a stationary bearing element upon which the rotor is adapted as to rotate, the stationary bearing element being formed with a liquid delivery conduit for delivery of liquid therethrough, a casing surrounding the stationary bearing element, said casing having an annular formed therein, a liquid reservoir surrounding said casing, said casing being formed with an opening for admission of liquid from the reservoir to the annular channel, cooperating parts liquid retaining channel 7 on the rotor and bearing element for delivering liquid under thepressure to 'the liquid delivery conduit, the stationary bearing element being relation in front of the duct formed in said cas-.

ing, adapted to receive the impact of at least a major portion of the liquid stream flowing from the return conduit, whereby the liquid will be returned to the supply in the reservoir without a substantial degree of agitation.

14. A liquid delivery pump system for oil and similar liquids comprising a rotor, a stationary bearing element upon which the rotor is adapted to rotate, the stationary bearing element being formed with a liquid delivery conduit for delivery 0! liquid therethrough, a casing surrounding the stationary bearing element, said casing having an annular liquid retaining channel formed therein, a liquid reservoir surrounding said casing, said casing being formed with an opening for admission oiliquid from the reservoir to the annular channel, cooperating parts on the rotor and bearing element for deliveringliquid under pressure to the liquid delivery conduit, the stationary bearing element being formed with a liquid return conduit, said conduit terminating in a groove formed in the stationary bearing element, the rotor including an annular casing rotatable therewith and surrounding the stationary bearing element .in a position to close saidgroove, said casing being formed with a duct .located so as to be in constant communication with said groove to provide for the egress of liquid entering the groove from the liquid return conduit, and a baflle element comprising an annular flange secured on the stationary bearing element in a position spaced from the duct in the rotor casing whereby'said flange will receive the impact of at least a major portion of the liquid flowing from the return conduit, said flange being formed with a discharge opening above the normal level of liquid 'in the reservoir, whereby liquid may freely flow therefrom back'to the liquid in the reservoir.

TI-IOMAS L. BONEN. 

